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20252453-T-424 项目

4.2.8.1.2 复合曲线剖面定义(CompositeCurve Profile Definition)

复合曲线剖面定义通过由多个复合曲线段组成的复合曲线来定义横截面使用的闭合二维曲线。每个复合曲线段都有一个父曲线,该父曲线是折线或修剪曲线。修剪曲线的基曲线类型为直线、圆或椭圆。

下图展示了应用此概念时使用的通用类和关系。

<a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a> IfcArbitraryProfileDefWithVoids 1. ProfileType [1:1] 2. ProfileName [0:1]      HasExternalReference [0:?]      HasProperties [0:?] 3. OuterCurve [1:1] 4. InnerCurves [1:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProfileTypeEnum.htm'>IfcProfileTypeEnum</a> IfcProfileTypeEnum <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a>:ProfileType1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcProfileTypeEnum.htm'>IfcProfileTypeEnum</a>:IfcProfileTypeEnum0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcLabel.htm'>IfcLabel</a> IfcLabel <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a>:ProfileName1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcLabel.htm'>IfcLabel</a>:IfcLabel0 IfcCompositeCurve_0 IfcCompositeCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. Segments [1:?] 2. SelfIntersect [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a>:OuterCurve1->IfcCompositeCurve_0:IfcCompositeCurve0 IfcCompositeCurve_1 IfcCompositeCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. Segments [1:?] 2. SelfIntersect [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcArbitraryProfileDefWithVoids.htm'>IfcArbitraryProfileDefWithVoids</a>:InnerCurves1->IfcCompositeCurve_1:IfcCompositeCurve0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a> IfcCompositeCurveSegment      LayerAssignment [0:1]      StyledByItem [0:1] 1. Transition [1:1]      UsingCurves [1:?] 2. SameSense [1:1] 3. ParentCurve [1:1] IfcCompositeCurve_0:Segments1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a>:IfcCompositeCurveSegment0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTransitionCode.htm'>IfcTransitionCode</a> IfcTransitionCode <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a>:Transition1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTransitionCode.htm'>IfcTransitionCode</a>:IfcTransitionCode0 IfcBoolean_0 IfcBoolean <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a>:SameSense1->IfcBoolean_0:IfcBoolean0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a> IfcTrimmedCurve      LayerAssignment [0:1]      StyledByItem [0:1] 1. BasisCurve [1:1] 2. Trim1 [1:2] 3. Trim2 [1:2] 4. SenseAgreement [1:1] 5. MasterRepresentation [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCompositeCurveSegment.htm'>IfcCompositeCurveSegment</a>:ParentCurve1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:IfcTrimmedCurve0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPolyline.htm'>IfcPolyline</a> IfcPolyline      LayerAssignment [0:1]      StyledByItem [0:1] 1. Points [2:?] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:BasisCurve1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPolyline.htm'>IfcPolyline</a>:IfcPolyline0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCircle.htm'>IfcCircle</a> IfcCircle      LayerAssignment [0:1]      StyledByItem [0:1] 1. Position [1:1] 2. Radius [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:BasisCurve1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCircle.htm'>IfcCircle</a>:IfcCircle0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a> IfcEllipse      LayerAssignment [0:1]      StyledByItem [0:1] 1. Position [1:1] 2. SemiAxis1 [1:1] 3. SemiAxis2 [1:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:BasisCurve1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a>:IfcEllipse0 IfcCartesianPoint_1 IfcCartesianPoint      LayerAssignment [0:1]      StyledByItem [0:1] 1. Coordinates [1:3] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:Trim11->IfcCartesianPoint_1:IfcCartesianPoint0 IfcParameterValue_0 IfcParameterValue <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:Trim11->IfcParameterValue_0:IfcParameterValue0 IfcCartesianPoint_2 IfcCartesianPoint      LayerAssignment [0:1]      StyledByItem [0:1] 1. Coordinates [1:3] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:Trim21->IfcCartesianPoint_2:IfcCartesianPoint0 IfcParameterValue_1 IfcParameterValue <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:Trim21->IfcParameterValue_1:IfcParameterValue0 IfcBoolean_1 IfcBoolean <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:SenseAgreement1->IfcBoolean_1:IfcBoolean0 <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmingPreference.htm'>IfcTrimmingPreference</a> IfcTrimmingPreference <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmedCurve.htm'>IfcTrimmedCurve</a>:MasterRepresentation1-><a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcTrimmingPreference.htm'>IfcTrimmingPreference</a>:IfcTrimmingPreference0 IfcCartesianPoint_0 IfcCartesianPoint      LayerAssignment [0:1]      StyledByItem [0:1] 1. Coordinates [1:3] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcPolyline.htm'>IfcPolyline</a>:Points1->IfcCartesianPoint_0:IfcCartesianPoint0 IfcAxis2Placement2D_0 IfcAxis2Placement2D      LayerAssignment [0:1]      StyledByItem [0:1] 1. Location [1:1] 2. RefDirection [0:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCircle.htm'>IfcCircle</a>:Position1->IfcAxis2Placement2D_0:IfcAxis2Placement2D0 IfcPositiveLengthMeasure_0 IfcPositiveLengthMeasure <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcCircle.htm'>IfcCircle</a>:Radius1->IfcPositiveLengthMeasure_0:IfcPositiveLengthMeasure0 IfcAxis2Placement2D_1 IfcAxis2Placement2D      LayerAssignment [0:1]      StyledByItem [0:1] 1. Location [1:1] 2. RefDirection [0:1] <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a>:Position1->IfcAxis2Placement2D_1:IfcAxis2Placement2D0 IfcPositiveLengthMeasure_1 IfcPositiveLengthMeasure <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a>:SemiAxis11->IfcPositiveLengthMeasure_1:IfcPositiveLengthMeasure0 IfcPositiveLengthMeasure_2 IfcPositiveLengthMeasure <a href='/IFC/RELEASE/IFC4x3/HTML/lexical/IfcEllipse.htm'>IfcEllipse</a>:SemiAxis21->IfcPositiveLengthMeasure_2:IfcPositiveLengthMeasure0
Figure 4.2.8.1.2.A